Chains



(No Modem 2 sheets-sheen 1.

J. BYRNE.

CLUTCH FOR HOISTING CHAINS.

No. 888,022. Y Patented Aug. 2l, 1888.

lili Il IMMIHIIHM N. PETERS. Pham-uhmm. wuhnglon. D. C.

(No Model.) 2 Sheets-Sheet 2.

J. BYRNE.

CLUTCH PCR HOISTINC CHAINS.

No. 388,02 Patente u ..211888. #2154i fi d Cif'lw F aal A Troie/VHS' Unirse STATES Pnrnn'r @trice JAMES BYRNE, OF BALTIMORE, MARYLAXD.

CLUTCH FOR HOISTING-CHAlNS.

SPECIFICATION forming part of Letters Patent No. 388,022, dated August 2l, 1888.

Application tiled February 18, 1888. Serial bfi-1.264.448.

.To aZZ whom t may concern:

.Be it known that I, JAMES BYRNE, of the city of Baltimore and State of Maryland, have invented anew and useful Improvement in Hoisting Devices, of which the following is a full description.

In the drawings which accompany this Specification, Figure l shows a boat and wharf, the hoisting-chain, and windlass, with bucket attached to the chain, and the improved device 1n position on the chain. Fig. 2 shows a side view of the device with the ring and chain passing through it, the lever pivoted to one side of the ring, and also 'in dotted lines the position of the lever when it has caught the chain Fig. 3, another form of the device, showing a plain ring, of round iron,passing through a hole in the lever. Fig. 4 shows the ring with the lever in position. The lever is made wide where the pivot passes through, and the space between the ends is widened at the part where itis pivoted tothe ring. Fig. 5 shows the ring with wide opening to be slipped over the chain. Fig. 6 shows the device when the lever has caught the chain and forced it against the outer side of the ring.

Viewing Fig. l, A is a vessel lying at the wharf B. Upon the wharf are the cars C, in position to receive the load to be transferred from the vessel A. The outer end of the vessels boom c is hoisted up, and at its end is placed a. pulley-block, c. Through this block and over its pulley passes the bucket-chain d. (Shown in full lines in its position over the Wharf and in dotted lines passing down into the hold of the vessel.)

D is the bucket on the end of the chain and attached thereto by the ordinary hook. The other end ofthe chain, to which the bucket is attached, is wound upon the ships windlass E. The bucket is lowered into the hold and charged and hoisted in the usual way.

The improved device is shown in Figs. 2, 3, et, 5, and 6, in which F is a ring, of suitable metal, through which the hoisting-chain d passes. This ring is open at one side, and the ends project outwardly to admit of a pivot, f, passing through them. Fitted between these projecting ends is a lever, f, constructed to swing upon the pivotf, which passes through it when in position between the projecting (No model.)

ends of the ring. This lever,wheu in position, as shown in full lines in Fig. 2 or as shown in Fig. 4, stands upright or vertically, allowing free passage for the chain cl in either direction. `When in the position shown in Fig. 6, it clutches the chain and holds it rigidly. This device is suspended by the rope h and hangs normally, so as to allow the chain d to pass perpendicularly through the ring. At the other end of the lever is attached a rope, h', which passes around a windlass, h2. It may, however, be pulled hy hand, if desired. The rope 7L, upon which the device is suspended, is itself suspended from a rope or cable, t', and runs on this rope by means of a. pulley attached to the rope, asshown at i', or by means of an ordinary ring, through which the rope t passes. This rope may be attached to any suitable part of the vessel or its rigging. As shown in the drawings, it is attached at one end to the guy-rope c3, and at the other to the outrigged hoorn ed, or the rope It may pass up through a pulley and down again, and its other end may be hitched to any suitable part of the vessel,oz` it may have a weight attached sufficient to hold up the ring and lever.

It will be observed that the rope h is attached to the nose of the lever f', and as the lever opens upwardly the weight ofthe ring and lever will be sufficient to open the lever and detach it from the chain whenever it is free or not drawn taut by the rope It', attached to the other end of the lever. Thus the suspendingrope h performs the double function of suspending the device and opening the clutch when the lever is loosened. The rope k may pass through a pulley on the end of the outrigged boom n.4.

The operation of the device is as follows: When the bucket is loaded in the hold of the vessel, it is hoisted, as usual, the hoistingchain passing freely through the ring with the lever f standing perpendicularly and offering no obstruction to the free passage of the chain. When the bucket arrives ata height sufficient to be swung over to the ear, the rope h is pulled. This raises the end of the lever to which the rope is attached and forces the other end against the chain, pressing it against the opposite side of the ring and clutching it thereto. By continuing the pull upon the rope IOG h the bucket is carried over above the car and is then dumped. While it is being pulled A over the rope 7L, suspended from the rope i,

runs along the rope@ without resistance until it reaches the dumpingpoint. This rope z' need not be tight, butshould havea slight sag, so that the pulley or bulls-eye z" might not force atendency to run too far in either direction. When the load is dumped, the rope h is loosened, and the Weight of the device opens the clutch, when the hoisting-chain is free to pass through the chain in either direction, While the Weight of this chain with the bucket attached is sufficient to draw the suspended clutch back into position to hang normally over the hatch. 6 with its open ends, it may be slipped over the hoisting-chain by taking out the leverf and its pivot and then inserting them again when in position. When the device is used, with the rope lz passed through a pulley and having-a counterbalanced Weight attached at the other end of the rope, this rope runs on the pulley and the weight returns it to place. When usedin the same Way Withoutthe weight, it is caught by hand and pulled back to place and then hitched in position to any suitable part of the vessel.

What I claim is- 1. In ahoisting apparatus, a hoisting chainclutching device consisting of a ring, of metal or other suitable material, having a lever, as

As the ring is shown in Fig.

f', pivoted to the ring, so as to rock vertically, in combination With asuspending-rope for the device attached to the short arm of the lever, and which rope also operates to release the lever, substantially as described.

2. In a hoisting apparatus, a clutching device for the hoist-chain, consisting of a. ring, of metal or other suitable material, having one side open to slip over the hoist-chain, and projecting ends to support a pivot, in combination with a lever pivoted to the ends, a. traveling suspending-rope attached at its lower end to the short arm of thelever, and the hoistchain d, arranged and operating together, substantially as described.

3. In a hoisting apparatus, the combinationl of a clutching device for the hoist-chain sus'- pended by a rope, as h, the carriage rope or cable i, to .which the rope h is loosely suspended, so as to slide thereon, and the hoist chain d, for the purpose set forth.

4. In a hoisting apparatus, a clutching device for the hoist-chain, in combination with the rope h, by which it is suspended, the crossrope t', upon which the rope h is arranged to slide, the hoist-chain d, and means attached to the clutching device for hauling the load to the dump, substantially as set forth. Y

- JAS. BYRNE. Witnesses:

ARTHUR STEUART, FELIX R. SULLIVAN. 

